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Class 9ScienceExploring Mixtures and Their SeparationHomogeneous and heterogeneous mixturesEasy
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Which option is least likely to form a true solution because homogeneity is absent?

Answer and explanation

Correct answer: Separate layers of water and oil

A true solution must be homogeneous, meaning its composition is the same throughout and no separate layers are visible. Water and oil are immiscible, so they remain in separate layers; this proves the mixture is heterogeneous and not a true solution. A single layer of water and alcohol, completely dissolved salt water, and uniformly mixed air satisfy the required homogeneity under the stated conditions. Hence C is correct.

Related tags

HomogeneityMiscibilityHeterogeneous MixturesSolutionsScienceClass 9 McqHomogeneous And Heterogeneous MixturesExploring Mixtures And Their Separation
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10 more MCQs
  1. 1What does it mean for a solution to be homogeneous?
  2. 2Which is a correct example of a homogeneous mixture?
  3. 3If the components of a mixture look uniform throughout, it is closer to what?
  4. 4Why is oil and water forming separate layers not called a true solution?
  5. 5If components in a mixture appear in separate layers, why will it not be considered a proper solution?
  6. 6A mixture looks uniform and contains two gases. What is its most appropriate classification?
  7. 7Which statement correctly shows the homogeneous nature of a solution?
  8. 8What is the best reason for considering air a homogeneous solution?
  9. 9If solute particles are not seen separately and the whole mixture is uniform, it is close to what?
  10. 10A mixture has uniformly mixed components, but it is not liquid. Which example best supports this statement?
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